Microphone line tube



FIG. 1 is a front view of a microphone line tube, showing our new design;

FIG. 2 is a side view of the design;

FIG. 3 is a top view of the design;

FIG. 4 is a bottom view of the design;

FIG. 5 is an isometric view of the design; and,

FIG. 6 is an isometric view of the design.

The broken lines in FIGS. 1-6 depict parts of the microphone line tube that form no part of the claimed design. 

CLAIM The ornamental design for a microphone line tube, as shown and described. 